From 5c149314d91876f743ee43efd75b6287ec55480e Mon Sep 17 00:00:00 2001 From: Kangjie Lu Date: Mon, 11 Mar 2019 02:06:06 -0500 Subject: [PATCH] net: rocker: fix a potential NULL pointer dereference In case kzalloc fails, the fix releases resources and returns NOTIFY_BAD to avoid NULL pointer dereference. Signed-off-by: Kangjie Lu Signed-off-by: David S. Miller --- drivers/net/ethernet/rocker/rocker_main.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/net/ethernet/rocker/rocker_main.c b/drivers/net/ethernet/rocker/rocker_main.c index c883aa89b7ca..a71c900ca04f 100644 --- a/drivers/net/ethernet/rocker/rocker_main.c +++ b/drivers/net/ethernet/rocker/rocker_main.c @@ -2805,6 +2805,11 @@ static int rocker_switchdev_event(struct notifier_block *unused, memcpy(&switchdev_work->fdb_info, ptr, sizeof(switchdev_work->fdb_info)); switchdev_work->fdb_info.addr = kzalloc(ETH_ALEN, GFP_ATOMIC); + if (unlikely(!switchdev_work->fdb_info.addr)) { + kfree(switchdev_work); + return NOTIFY_BAD; + } + ether_addr_copy((u8 *)switchdev_work->fdb_info.addr, fdb_info->addr); /* Take a reference on the rocker device */